Ladle for die-casting machines.



J. K. STEWART, DECD.

J- B. STEWART. EXECUTRIX.

- LADLE FOR DIE CASTING MACHINES.

APPLICATION FILED 1AN.5. 191s.

1,21 9,359. Patented Mar. 13, 1917.

JOHN K. STEWART, OF CHICAGO, 'ILLINOIS; JULIA B. STEWART ExEouTmx or SAID JOHN K. STEWART, DEcEAsED.

' LADLE FoE IE-oASTING MACHINES.

Patented Mar. 13, 1917.

Application filed January 5, 1916. Serial No. 70,380.

To all whom it may concern Be it known that 1, JOHN K. STEWART. a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new provements in Ladles for Die-Casting Machines, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

This invention relates to means for feeding molten metal from a melting pot or other heatedcontainerto a suitable die or mold with the aid .of air pressure, and has for its purpose the minimizing-of the quantity of metal exposed at any one time to such air pressure with a view to minimizing the oxidation of molten metal from this cause. It consists of the features and elements described and shown in the drawings as indicated by the claims.

, In the drawings:

Figure 1 is a vertical section showing a melting pot and ladle therein embodying this invention.

Fig. 2 is a transverse vertical section taken as indicated at line 22 on Fig. 1.

The construction illustrated in the drawings comprises the usual retort or heating chamber, A, fitted with gas burners, B, and

supporting a melting pot, C, which contains the main body of molten metal shown at D. Within the melting pot, C, there is mounted on trunnions, E, a ladle member, E, whose containing chamber is in the form of a conduit, E leading from a discharge mouth, E back into and through one of the trunnions, E to a suitable coupling with the source of compressed air not shown. In ad dition to the portion containing the conduit, E the ladle member is provided with a stiffening rib, E and as a continuation of that rib there is a portion forming a segmental gear, E concentric with the trimnions, E. A rock shaft, F, is provided with a pinion, G, meshing with the'segmental. gear, E and through a rocker arm, H, and

connecting rod, J, is arranged for actuation by any suitable source of power, not shown.

Within the melting pot, (Lt here is fixedly mounted a discharge nozzle, K, having an oblique inner terminal formed to connect with the discharge mouth, E of the ladle, E,- and whose outer end is adapted for registration and connection with the molding die shown at L. Assuming the .ladle member as being first in the position indicated in and useful Imdotted lines in Fig.' 1, it will be seen that its cavity, E will fill with the molten metal, D, in the melting pot, C, substantially up to the level of such metal in the melting pot itself, so that when the die, L, has been moved into connection with thedischarge nozzle, K, the ladle member, E, may be rotated to the position shown in full lines in Fig. 1, so that the metal contained in its cavity, E, will be isolated from the remainder of the molten metal, D, in the melting pot, C. Thus the compressed air when applied through the hollow trunnion, E will have no opportunity to oxidize the principal supply of metal as is the case in many constructions now in use in which the air pressure is applied to the surface of a larger body ofmetal. The pressure thus furnished will serve to force the contents of the cavity, E through the discharge nozzle, K, and into the die, L, completely filling all recesses of thedie to form the desired casting. The air pressure being then shut off, the ladle member, E, may be rotated back to the position shown in dotted lines for refilling for the, next casting.

end of the compression spring, M, through.

slidably mounted an interposed washer, T, on the tubular member, 0. The opposite end of the spring, M, reacts against a flange,

of the tubular member, 0, through which it transmits the pull of the rod, J to the terminal, which is pivoted to the end of the rocker arm, H. For reverse movement for swinging the ladle to the position shown in dotted lines the pin, N, engages directly against the other flange, O, of the member, 0, and no yielding connection is necessary since exactness of position of the ladle at-this important.

1. The combination of a receptacle for molten metal, having a discharge nozzle,

for protrusion of the of a ladle device having a cavity and a mouth adapted to receive a charge of molten metal and to discharge the same, said ladle device havin also connections for supplying compressef air to the cavity for discharging the metal therefrom to the mouth and for moving the ladle device in said receptacle to carry said discharge mouth into and out of registration with the discharge nozzle. 7

2. Ina receptacle for molten metal, a ladle device mounted for movement therein, a

fixed discharge nozzle for the receptacle,

the ladle having a cavity with a mouth positioned to be submerged in the molten metal at one limit of movement of said ladle and adapted to connect with said nozzle at the other limit of such movement, together with 1 a connection for admitting compressed air to the cavity to discharge the molten metal therefrom.

3, In receptacle for molten metal, aladle device mounted for movement therein, a

' fixed discharge nozzle for the receptacle positioned above the level of the molten metal therein, the ladle having a cavity with a mouth adapted to be submerged in the molten metal at one limit of movement of said ladle and adapted to connect with the nozzle at the other limit of such movement, together with a connection for admitting compressed air to the cavity when said mouth is connected with said nozzle for-effecting discharge of the molten metal from the cavity through said nozzle.

4. In a receptacle for molten metal, a

ladle device mounted to rotate therein, and a fixed discharge nozzle for the. receptacle, said ladle having a cavity with amouth positioned'to be'submerged in the molten metal at one limit of its rotative movement, and adapted to register with said nozzle at the other limit of such movement, together with a connection for admitting compressed air to 4 5 the cavity to discharge the metal therefrom.

5. In a receptacle for molten metal, a ladle device mounted on trunnions to rotate in said receptacle, and a fixed discharge nozzle for the receptacle, said ladle having a cavity with a mouth positioned to be submerged in the molten metal atom limit of its rotative movement, and adapted to register with said nozzle at the other limit of such movement, together with a connection leading through one of said trunnions to the ladle cavity for admitting compressed air to discharge the molten metal therefrom through said nozzle.

6. The combination of a receptacle for molten metal, a discharge nozzle therefor, a ladle device having a cavity and a mouth 'thereforadapfled to admit a charge of the molten metal to the ladle cavity, together with a connection for supplying compressed air to said cavity for discharge thereof, and means for relatively moving the ladle member and the nozzle into connection to effect such discharge through said nozzle, said means comprising gear teeth on one of said parts, a rock shaft having a pinion positioned to mesh with said teeth, and means for rotating the rock shaft to effect the rela- .tive movement of the said parts. 8. In a receptacle for molten metal, a. ladle device mounted to rotate therein, and

a fixed discharge nozzle for the receptacle, said ladle having a cavity with a mouth positioned to besubmerged in the molten metal at one limit of its rotative movement, and

adapted to register with said nozzle at the other limit of such movement, together with a connection for admitting compressed air to the cavity to discharge the metal therefrom, and means for effecting the rotation of. the ladle member comprising a segmental gearrigidlyv associated therewith, a rock shaft, a pinion on said shaft positioned to mesh with said gear, and means for rotating the rock shaft in either direction at will.

9. In a receptacle for molten metal, a ladle device mounted to rotate therein, and a fixed discharge nozzle for the receptacle, said ladle having a cavity with a mouth positioned to be submerged in the molten metal at one limit of its rotative movement, and

adaptedto register with said nozzle at the other limit of such movement, together with a connection for admitting compressed air to the cavity to discharge the metal therefrom, and means for effecting the rotation of the ladle comprising a gear rigidly associated therewith, a rock shaft, a pinion on said rock shaft positioned to mesh with said gear, a crank arm on the rock shaft, and a link connected to said crank arm, said link being yieldingly extensible in the direction, of its movement which effects registration of the ladle mouth with the discharge nozzle.

In testimony whereof I have hereunto set my hand at New York city, N. Y., this 3d day of January, 1916.

, I JOHN K. STEWART. 

